Method and apparatus for rolling disks



Nov.: 16 1926.` 1,606,904

H. R. GEER METHOD AND APPARATUS FOR ROLLING DISKS File@ Sept. 18, 1929 2Sheets-Sheet 1 yI9 70 104 l g? if@ 'F' .1. "Wfl .INVENTOR lHR. GEERMETHOD AND APPARATUS FOR ROLLING DISKS Nov.

Filed sept. 18, Y1920 2 Sheets-sheet 2 IN'vENToR rasata New.; i6, 1926.

PATENT OFFICE.

y HARRY n. enen, or Jonnsrown, PENNsYLvANIA, AssmNon, vPY MnsNn ASSIGN-ntnnrs, To PUDD WHEEL COMPANY, or PHILADELPHIA, PnNNsYLvANrA, A con-PORATON OF PENNSYLVANIA.

y i METHOD AND APPARATUS Pon ROLLING! DIsKs.

My invention relates to a method and apparatus for rolling suitableblanks into disks Which may have a relativelyy thick central portionanda thinner outer portion, or a 5 tapered outer portion either with orWithout a comparatively thick periphery. rIhese disks may be usedformany purposes and in various constructions, but are particularlyadapted for automobile and other vehicle l@ wheels, agriculturalimplements, etc.

The objectl of my invention is 'to provide a method and apparatus fordisk rolling which will produce disks from suitable blanks, and saiddisks may have a parallel '5 or tapered reduced form from Uthe vcentralportion towards the periphery, which are adapted to t-he uses outlined.Rolled disks have proven their superiority over machined turned disks inboth quality and cost, and my method and machine are particularlyadapted to shape the disks rapidly without unduly distorting' the grainof the metal and thereby increasing the strength and decreasing the costof the disks.' v

My method of producing disks consists of taking a blank of steel, ironor other metal,

preferably a flat circular plate of the proper thickness and weight toproduce the de-v sired disk, and if desired the blank can be heated in asuitable. furnace, and when p heated the Iblank is placed upon a metalplaten, the center port-ion of the same clamped. or secured thereto, andin order-to center the blank it may-be provided with a centralperforation, which fits over a corresponding projehtion'or'v stud on theplaten.

'The portion clamped may be of any reasonable diameter, or as small aspossible to provide the necessary holding surface. The platen may beeither flatv or plane, or may havel a slight taper to correspond withthe taper to be given the disk, or may have a groove inor naartlieperiphery or elsewhere to produce a thickened portion of the disk ifdesired. Infact the platen may be of any form to suit the shape of thedisk to be made.

.After heating, the blank is clamped in position on the platen, ,theplaten rapidly rotated, and one or mo-re rolls are projected with forceagainst the blank and gradually moved over lthe surface of the same toroll or spin. the blank into the desired shape.

Application led September 18, 1320. SerialNo. 411,083.

In doing'this I prefer to first project the roll or rolls against thatportion of the blank near the center, thence traversing the rolls overthe blank at a suitable speed toward 'the circumference, thus causingthe outer portion of the blank to curl up from the surface of the'platenfthereby eliminating the cooling effect of Athev platen thereon.

If the heated blank should be in contact with the metal platen for anyconsiderable time, the heat would ,be conducted away from the blank sorapidly that it Would be difficult or impossible to make the plasticflow of metal by means of the rolls. LAs the rolls traverse from orynear the centertoward the periphery, the steel blank or disk is'rotatedby the rotating platen and the outer portion of the blank curves awayfrom the rplaten contacting only with the air, and air being anonconductor, the outer portion re-` mains hot as the rolling actionprogresses from the center toward the circumference.

I may use either one rolll or more, and I may rotate the platen and thedesired pressure of the rolls against the blank or disk may be suppliedin any manner or to anyv degree, as Will be readily understood.

In order to produce a disk with a thicker portion I may have a groove inthe platen 'near the periphery (as'shown'in Fig. 9)v or elsewhere, ormay stop the movement of the rolls a suificient distance from the edgeof the disk, thus leaving thereon the thickened portion of the blank, ormay move the rolls upwardly or away from the blank a certain distance tocause the thickening of the disk where desired While rolling the same.

My invention further comprises apparatus which firmly clamps the centralportion of a blank and holds it against a rotating platen, which may beshaped to conform with the desired cross section of the disk, while apair lof rolls, arranged on opposite vsides of the axis of the platen,frictionally engage and press forcibly against the blank as the rollsare fed toward the periphery of the-platen and the disk. The rotation ofthe platen and the blank clamped thereto` is thus transmitted to therolls which, as they are fed outwardly, roll, thin, taper or otherwiseshape the blank and increase the diameter thereof to the requireddegree. The blanks may be of any reasonable Ithickness and diameter and':fre preferably of circular shape,

although they may be of other shapes if de-V sired. The rolls arepreferably shaped to act one as a roughing roll and the other as afinishing roll and the axes of the rolls are arranged on opposite s idesof theaXis of the platen substantially in alignment. As the blanks whichI operate .upon are comparatively thin and heated and their centralpositions'are ordinarily not to be tapered,

these must be held irmlyand clamped by said central portion upon theplaten in order to prevent the tearing or distortion ofi their centersdue to the pulling action of the rolls on the other portion.

Having thus given a general description of my invention. I will now, inorder to make e the matter more clear, refer to the two annexed sheetsof drawin Figure 1 is a top p an view of my iniproved disk rollingmachine with parts broken away to show the gearing for reciprocating therolls; Figure 2 is .a side elevation of my disk'rolling4 machine, theright hand portion, thereof bein shown in a vertical section takensubstantially on the center line of the machine; Figure 3 is a detailview showing the roughing roll, in' dotted lines, superimposed on thefinishing roll, in solid lines, to illustrate the relative actionJ ofthe rolls on the blank as they are causedto traverse the blank from itscentral portion outwardly; Figure 4 is an end elevation of 'f my diskrolling machine with the reversing clutch mechanism shown in section;Figure 5 is an elevation partly in section of the end opposite thatshown in Figure 4; Figure 6 is a longitudinal sectional view showing indetail a part of the driving mechanism for reciprocating the rolls; andFigures 7, 8

and 9 show a blank, a taper disk and a taper diskv with thicker edge,respectively.

Referring now to they characters of refer-- ence on the drawings: Theframe 1 of my disk rollin machine is rovided withv guides 2 in whic areslidab y mounted the 'columns 3 on which the r'oll shaft head 35 is`adjustably 4 secured. The lever 8 is fulcrumed at an intermediate pointon the shaft 7 which is carried in the bearings 6 Aon the frame 1. kTheinnerend 9 of the lever 8 works in a notch 10 in the equalizer bar 11and the outerend l12 works in the recess 1 3 of the piston14, whichreciprocatesin .the cylinders 15 and 16.` The cylinders 15l nections 17'and 18 respectively. Pins 21 pass through the eyes 20 of theAequalizervbar 11 and engagev the intermediand 16 are pr'ovided withliu-id pressure conate ears-221 of the link 23, which is 'hinged on the'shaft 95. The ends of the shaft 95 are mounted in transverse bars 94,which connect the lower ends of the columns 3 together in pairs. Thetransverse bars 94 carry shoes 96, upon which the lower ends of thelinks 23 work as the equalizer bar 11 is reciprocated. Rollers 25 aremounted on shafts 26, .which `are carried in the bearings. intheintermediate ears 22and the outer ears 24=of the links 23. The rollers25 ride on the contact shoes 27, which are secured' A11-annular bevel soas to. rotate therewith, is the platen 33 which is shown with a concaveupper face 34 adapted-to conform with one shape 'of disk that I desireto roll.

l do not confine myself, however, to the particularform. of platenshown, as it is manifestly evident that other forms may be used aspreviously mentioned herein `without deviating from the intent orpurpose of this specification. l

The ro'll shaft head 35 has'k the transverse central rib 38, which istovided with the boss 37 below the centra socket' 36.-r The .roll"shaft,which comprises two portions 41 and 42 having substantially alignedaxes.

is journaled at the ends in the bearings 43 and at the middle in thebearing 40, which is provided with the bearing cap 3?. Each portion4l'and 42, ofthe roll sha'fft has a groove 44, in which is mounted athreaded shaft 46. The'threaded shafts 46 fitinto and engage the nuts45, which are slidably mounted in the grooves 44 and are provided withprojections 47. The projections 47 slidably engage thegannular grooves48 between the bearing rings" 49 and thebushings 5() and 51, which aremounted in the rolls 52 and 53. vThe roll 52 shows one form of my rouhing rolll and the rolll 53 one form of m'y nishing roll, but theseforms. may be varied as desired. -f

yThe outer ends of the roll vshafts are provided `with bearings 54 'inwhich the threaded shafts 46 are journaled.-4 The bevel gears s 5 5,which are mounted on the outer ends of the threaded shafts 46 meshwith'the pinions 56 `on the outer, endsvqf the intermediate shafts 57.The inner ends of vthe shafts 57 have mounted thereon'bevel gears 58which .i mesh with the' bevel gears 59. The gears 59 are rotatably monted on. the drive shaft A60'and`each is provi ed with a female clutchelement 104 adapte to-"frictionally -engage the male clutch elements 63and 64, which are mounted on and rotate with the-drive shaft v66. Theupper male clutch element 63 is splined on thedrive shaft 60 andprovided with an automatic disengaging device which operates when therolls 52 and 53 reach the innerdimit of travel. The drive shaft 60 isjournaled in bearings 65 vand 6 6 and has at its lower end the bevelgear 61 which meshes with the bevel gear -"62 on, the main drive shaft28.

The automatic disengaging `means comprises a sheave 67 resilientlysecured to the male clutch member 63 and the rock shaft 73 journaled inthe bearings 71 and 72. Se-

`rock shaft 73, which raises the male clutch member 63, therebypreventing further rotation of the threaded shafts 46.

In order that the rolls may be adjusted for different thicknesses ofdisks, the roll shaft head is provided with a' screw adjustment wherebyit may be raised or low-v ered to the required amount on the columns 3.Worm wheels 76, which engage the upper threaded portions 77 of thecolumns 3, are rotatably mounted in the enlarged portions 78 of the rollshaft head 35. Worms 79 mounted on the shaft 80 engage the worm wheels76 and the shaft 80 is journaled in the bearings 81 and provided on itsouter end with the hand wheel82. f

The roll shaft head 35 4is provided with an upper fluid cooled rotatableclamping head 83, the lower end of which has the socket 84 that fitsover the projecting center 88 of the -lower clamping head 87. Coolingfluid is supplied to the upper clamping head 83 through the lpipe 85,and may be dis-- charged through a suitable outlet pipe connected to4 atank or wasted as preferred.

Mounted in the central opening 89.0f the platen 33 is thelo'wer fluidcooled rotatable clamping head 87, which is provided with the projectingcenterA .88. The clamping head 87 is arranged to rotate with the platen33 when in the depressed position and to remain at rest when in theraised position, even though the platen 33 is rotating. The partsl'co-operating with the yclamping heads 87 are mounted within theinterior of the central cylindrical portion'4 of the frame 1. Theclamping head 87 is mounted upon the flanged barrel 90 and a volutespring 91 surclamping head 87 isin the depressed posi- .tion it engagesa shoulder within the central, l

opening 89 of the platen 33 and the barrel 90 is supported on the ballbearing 107 and the clamping head 87 rotates with the platen 33. Coolingfluid is supplied to the clamping. head 87 through the pipe 93 anddischarged therefrom by another pipe or duct not shown.

vThe counterweights 97 for the roll aft head A35 are secured to theshafts 98 which i are journaled in the roller bearing 99 on the guides 2ofthe frame 1. The arms which carry the counterweights 97 areA eachprovided with a hook-shaped inner end 100 and the side plates 101 resttherein and engage the sockets 102 in the roll shaft head 35. The curledperiphery of the blank is 108.

As illustrated in Figure 7, 86 is the yfiat circular blank lwhich restsupon the flat platenl109. l As illustrated in Figure 8, the platen 33is,\tapered or dished to produce the tapered disk 103.

As illustratedV in Figure 9, the platen is provided with a dish or'taperin its central portion and with an annular groove 'in 1- its outerportion connecting with the same in order to produce a tapered disk withan enlarged rim portion as illustrated.

Assuming the parts of my disk rolling machine t be in theposition asshown on the drawings, the operation is as follows: A suitable blank 86,see Figure 2, preferably heated and having a central hole therein isplaced on the lower clamping head 87,

which is in the raised position shown, the

blank being centered by the hole therein and the central stud on theclamp which stud projects. within said hole. Power is sup- .plied to themain drive shaft 28, thereby 'rotating the platen 33 and the drive shaft60. The blank 86 will not rotate yet because of the braking actionexerted by the friction disks 105, which are held in close Contact bythe compression in the volute spring 91 as heretofore explained.

Fluid ressure is now admitted lto cylinder 15 tiirough the fluidpressure connection 17, thus advancing the piston 14 and moving theouter end 12 of the lever 8 to the right','whereupon the-inner end 9 ofthe lever 8 moves to the left, shifting the equalizer` bar 11 in thesame direction. The rollers 25 then ride on the contact shoes 27, thusdrawing the columns 3, which support the roll shaft head 35, downwardlyin the guides 2 againstv the action of the oounterweights 97.V Assumingthe adjustment of the roll shaft'head 35 tocbe correct for the thicknessof the blank used, the rolls 52 and 53 and the upper clamping head -83will Contact with .the blank 86. If the contact. is not that desired the\hand wheel 82 may 'be turned in the required direction, thus movcolumns3 to correspond with the thickness of theA lblank 86. Having theadjustment correctly made, however, the b lank 86 will be firmly heldbetween the upper and lower clamping heads 83 and 87 and the latter willbe depressed into the rotating position.

As the roll shaft head is lowered the,

female clutch lement 104 on the lower gear 59 will engage the maleclutch element 64, thus rotating the threaded shafts. 46 and traversingthe rolls 52 and 53 outwardly from the center of the blank 86. The rolls52 and 53 being in frictional engagement.

as shown at 108 in Fig. 3, thus conserving the heat thereof.

Fluid yunder pressure is now admitted to the cylinder 16 through thefluid pressure connection 18, thus advancing piston 14 and the outer end12 of the lever 8 to the left, whereupon the inner end 9 of the lever 8moves to the right, shifting the equalizer bar 11 in the same direction.The rollers 25 then ride off the contact shoes 27 and thecounterweights97 raise the roll shaft head 35 to its upper position. Thelower male clutch element 64 is thus disengaged and the female clutchvelement 104 on the upper gear 59 will vengage the upper spring pressedmale clutch element 63, whereupon the rolls 52 and 53 will be advancedtowards each other by the Arotation of the threaded shafts 46.

As the rolls 52 and 53 advance towards the rotation axis of the platen33, the roll 53 contacts with the lower end of the tripv lever 7.5, thusturning the rock shaft 73 and raising the male clutch element 63,

thereby preventing further rotation of the 5 threaded shafts 46 andautomatically stop-4 ping the rolls 52 and 53 at their inner limit oftravel. j

In ,the meantime the upper clamping head 83traveling up with the rollshaft`head 35 releasesthe disk 103 and the lower clamping head 87 israised clear ofthe rotating positionl by the volute spring 91. TheL diskis then removed and thermachine is ready for the insertion of anotherblank and the operation continues as before.l

In connection with the Voperation, .the manner in which the roll vshaftis mounted should be' noted." Byremoving the-outer bearing cap 43,*,thefcentral bearing cap 39, 5

and the i housing caps overl the gears 55 placed if necessary..

nnection ,therewith re"-v In working vwith heated blanks which arecomparatively thin and therefore subject to rapid cooling it isnecessary that the rolling action-be very fast, otherwise the blank willvhave to be reheated and rerolled one or more times in order to producethe required shape of the disk, thereby greatly addingto the 'cost ofthe finished disk.

My disk rolling machine isparticularly designed to accomplish therolling operation with one heating of certain types of blanks andwithout undue distortion'of the grain of the metal. For other blanksvand thinner disks I may reheat and reroll if desired.

To accomplish the purpose desired I place the roll axes in alignment andon opposite sides of the rotation axis of the disk, so that the rollswill tend to knead the material toward the periphery of the blank, so asto` increase the diameter thereof tothe required degree, as is necessarywhen a rolled disk of tapered or" reduced form is desired. Y Y iFurthermore, byusing rolls having relatively short faces in Contact withthe\ blank the action of the rolls' is practically ya pure rollingaction without\any slip to produce radially curved distortion of themetal and thereby weaken the disk. .The rolls and the blank travel atthe same velocity and as the pressure is limited to such a shorteleproduce disks rapidlyv as the different elements are co-ordinated toact with minimum physical and mental effort on the part o1 the operator.The platen and other moving parts do not have to be stoppedtoremovetheirolledv disks or to insert the blanks and the automatic stopfor limiting the: inner,

travel ofthe rolls'prevents any damage tov the machine throughcarelessness or oversight in'operation.

Although I have described and illustrated my invention inv considerabledetail, Ido lnot wish to be limited to the exact and specific detailsthereof, as shown and described, but may use such modifications in,substitution for, or equivalents thereof, as are emclampin head slightly.elevated aboye a ro tating p aten but not rotating with-the lat en,lowering roll 'and another clamping Vead into contactwith the centralportion of the blank, thereby ,clamping the blank onto the therebyexpanding and shaping the blank engagement with the blank.

' as desired.

2.. rlhe method of rolling a disk which consists of placing 'a heatedblank on a clamping head' slightly elevated above -a rotatlng platen,but not rotating with, the platen, bringing roll and another clampinghead into contact with the central portion of the blank, therebyclamping the blank to the rotating platen, and traversing the blank withthe rolls* outwardly from the center thereby expanding and shaping theblank as desired.

3. rllhe method of rolling a disk which consists in placing a blank on a,clampinghead slightly elevated above a rotating platen, but notrotating with the platen, bringing a roll and anotherclamping head intocontact with the central portion of the blank, thereby lowering thefirst-named. clamping' head and causing it to rotate with.

the rotating table and securing the blank against rotation on theplaten, and travers-y ing the blank with the roll outwardly to work it.

4. A disk rolling machine comprising a rotatable blanksupportingplaten', and an axially reciprocable roll having afrelativemovement of approach and separation,

-means for reciprocating said roll, means for causing said relativemovement of approach and separation, and a pair of clamping headsadapted to hold a blank on .the platen while they roll traverses theblank.

5. A disk rolling machine comprising a rotatable blank supporting1platen and an axially reciprocable roll having a relative movement ofapproach and separation, means for reciprocating the roll, means forcausing said relative movement of approach and separation,` and a pairof clamping heads adapted to -hold a blank on the laten as the blank istraversed by the ro one of said heads being normally raised slight lyabove the surface of the lplaten and non- 'rotatable' with the platen,to receive the blank initially, and means whereby saidl clamping lad iscaused to rotate and lowered to allow the blank to rest upon the surfaceof the platen when the opposed clamping head "is brought into -operative4.6. A disk rolling mill comprising a rotatable blank supporting platenand a cooperating roll having a relative movement of ,approach andseparation, said roll being axially traversable to wrok the blank, and apair of clamping headsrotatable, when clamping the blank in position,Iwith the platen and adapted nto hold a blank on lthe platen while theblank is traversed by the IOllS. i fi 7. A disk rolling machinecomprising a rotatable-blank supporting latenA and a cooperating rollhaving a re ative movement of approach and separation, said roll beingaxially traversable to 'work the blank and.

a fluid cooledclamping head adapted to hold a blank on said platen whilethe blank is traversed by the roll.

8. A disk rolling machine comprising a rotatable blank supporting platenand a' cooperating roll having a relative Tnovement of approach andseparation, said roll being axially traversable across the blank,

and a pair of fluid cooled rotatable clamping heads to hold a blank o nthe platen while the blank is traversed work it. Y

9. A disk rolling machinecomprising a rotatable `blank supporting platenand acooperating-roll carrying head having relative movement of approachand separation,

a rollen said head axially traversable crossby the roll to i wise of theblank, a clamping head on the roll head, and another clamping head onthe'platen for clamping a blank to the platen upon relative approachingmovement of the roll head and platen to cause the roll to operativelyengage the blank.

l0. A disk rolling machine comprising a` rotatable blank supportingplaten and a cooperating roll carrying head having a rela tive movementof approach and separation, a roll on said head axially traversablecrosswise of the blankto roll the same, rotatable a clamping heads forholding a blank-on said platen while traversed by the roll, one of saidclamping heads being carried by the roll head and the other b the laten,and

at least one of said heads eing uid cooled.

of the platen while being acted on by the roll.

1Q. Inl a machine of the class described, the combination of aSupportfor the blank to be rolled and a cooperating roll bodilyrotatable relative to one 'another and movable toward and awayfrom oneanother for rolling and to permit removal of the rolled blank, means forshifting the roll crosswise of the support to roll a blank thereon, andmeans controlled lby separation' of the support and the roll`forreturning-the roll to initial position.

13. A machine of the vclass, described comprising a rotating vsupportfor the blank, a

roll cooperating with said support, means for relatively moving saidroll toward the support to apply it to the blank under pressure, and forrelatively moving the roll away from the support, means for moving theroll radially of the blank, and means for automatically returningfsaidroll to the central portion of the blank when the roll reachesapredetermined yp'osition in its movement away from the support.

14. A machine ofthe character described comprising an axial support fora blank, rolling means for the blank, means to relatively traverse therolling means radially outward and inward as respects lthe axis, meansto relatively move the rolling means to approach it toward and toseparate it ,from the support, and automatic actuating devices for saidtraversing and .l approach and separation means cyclically relating themovements of the traverse and the approach and separation means.

15. In a machine of the class. described, the combination of a supportfor the blank vto be rolled and a cooperating roll bodily rotatablerelative to one another, approach and separation mechanism between theroll and the sup ort to move them toward and from each ot er to permitinsertion and removal of blanks, traversing and retraversing mechanismto shift the roll crosswise of the support to roll a blank thereon and'return the roll to starting position, and interlocking means betweensaid mechanisms whereby operation of one of them brings about 4operationof the other. N f' 16. In a machine of the character described, thecombination of a support for the blank to be rolled, and a cooperatingroll bodily rotatable relative to one another, a power-driven approachand separating mechanism to move the roll and the support toward andfrom each other, a power-driven traversing mechanismfor the roll toshift it -crosswise of the support to roll a blank thereon, interlockingmeans between said mechanisms whereby operation of one of thembringsabout operation of the other to carry the operations ofthe machinethrough a cycle, manual means to institute the cycle said support androll toapproach each other to bring the roll into contact withthe blank,

means for relatively moving said roll and said support to cause the rollto traverse the' means for relatively moving the roll and support tocause the roll to traverse the blank radially, means to cause theseparation of the roll and support, and means for causing the retraverseof the roll to the starting point, and means interlcking the means forcausing the approach and separation and the vmeans for causing thetraverse and retraverse.

20. An apparatus for rolling disks comprising means for supporting acircular blank, a cooperating roll engaging the blank, traversingmechanism for progressively shifting said roll radially outward from theaxis of the blank to gradually spin the metal of the same outward andreduce its thickness, approach and separation mechanism for moving thesupporting means and roll relatively toward and'froin each other -topermit-insertion and removal of blanks and to apply rolling pressure,and independent means for adjusting said supporting means and rollrelatively to each other to 7vary the thickness of the disc.'

21. A machine of the class described comprising a substantiallyhorizontal support for a blank' to be rolled and a roll carrying headrelatively movable toward and from each other to permit the insertionand removal of blanks, columns interconnecting said support and rollhead, means for 'effecting said* relative movement of said blank supportand roll carrying head, and means for effecting an independentadjustment of oner of said relatively movable members along said columnsto 'vary the thickness fof the blanks. v v

22. A machine of the class described comprising a support'for a blankand a roll head arranged in vertical relation and relatively movabletoward land from each other to permitl the insertion and removal ofblanks, columns interconnecting said support and roll head, and meansfor elfecting an independent adjustment ofthe distance ica between/ saidsupport and roll head by I movement of one of said members along saidcolumns, said means comprising screwt-hreads on said columns, and nutscooperating with said screw-threads.

23. A machine of 'the 'classl described comprising a support -for ablank and roll head arranged in vertical relation and relatively movabletoward and from each other to permit insertion and removal of-blanks,

columns interconnecting ksaid support and roll head, and means foreffecting an independent adjustment of the distance between said supportand roll head comprising ad'- justable connections between one of saidrelatively movable members (support and land support comprising screwthreads on said columns, nuts cooperating with said screw threads, andmechanism `for simultaneously rotating said-nuts. N

25. A machine of the character described comprising a horizontal platento support the blank, an overhead roll support freciprocable toward andfrom said platen, and rolls carried by said support on opposite sides ofthe platen axis and traversable laterally of said axis over the iace ofthe platen.

26. A machine of the character described comprising ahorizontally-disposed rotatable platen to support the blank tobeoperated upon, an overhead roll support movable toward and from theplaten, traversing rolls carried by said head and .traversable thereonradially over the-face of the platen, and roll traversing mechanismcarried by the roll support.

27. A machine of the class described comprising a frame, a rotatablymounted table adapted to support a blank to be rolled, and a rollcarriage having arelative movement of approach and separation, and meansfor causing the relative movement of approach and separation of saidtable and carriage comprising a toggle-like connection between saidframe and one of said relatively movable members.

28. A machine of the clas`s described comprising a frame, a rotatablesupport for a blank to be' rolled and a roll carriage having a relativemovement; of approach and separation, a roll lon said ycarriage andadapted to operate upon a blank on said support, and means for causingthe relative movement of approachl and separation of said support andcarriage comprising a toggle-like connection between said frame and voneof said relatively movable members locking said relatively movablemembers in their position of approach while the blank is being operatedupon by the roll. 29.y A machine of thecharacter describe comprising arotating support for a blank Y taneously.

ity of toggle like. devices arranged symmetrically about the axis of themachine and means Jfor operating said devices simulv30. A machine ofthe'character described comprising a rotating support for a blank to berolled and a roll'carriage yhaving a relative movement of approach andseparation, a traversable roll on said carriage and adapted to operateupon a\ blank while being traversed radially thereof, and means foreffecting said relative movement of ap` proach and separation comprising-a plurality of parallel shafts carrying'toggle links, and-meansconnecting said shafts whereby' they are constrained to operate inunison.

' 31. A machine of the character described comprising a rotatable platenand a roll carrying head having a relative movement toward and from eachother and interconnected through slidable columns serving fto c guidesaid relatively movable ,parts in their movements toward and from eachother,`

means interconnecting the ends of the columns, and approach and4separation mech'- anism between the interconnecting means and one ofthe relatively movable elements;

32. A machine of the class described comprising a frame, a rotatingsupport for a lank tobe rolled and a roll carriage having a relativemovement of approach and separation, a roll on said carriage forcooperation with the blank, columns connectingsaid roll carriage andframe and anking said rotating support and serving as 'guides for ics Asaid' relatively movable parts in their approach and separationmovements, said columns extending rom the base kof the frame totheextreme top of the machine and being llt) in tension during the rollingoperation -1 throughout substantially their entire lengths.

33. A machine of the class described comprising a rotatable support fora blank to -be rolled, and a carriage vertically movable relative tosaid support, a traversable roll carried bythe carriage and adapted tooperate upon a blank on said support while traversing radiallyoftheblank, means for relatively moving the blank support and roll l jacentends supported by relatively thin supface.

ports to permit the rolls to closely approach the center of the blank.

85. A machine of the class described comprisingca rotatingblank\support, and a roll adapted to traverse the blank radially azfixed roll shaft for rotatably supporting the roll, and means ,formoving said roll `along the fixed roll shaft. v

36. A machine of the, class described comprising a traversing roll, alixed roll shaft for rotatably supporting said roll,` and meanscomprising a thrust screws7 and a nut cooperatingwith said screw formoving said roll along the fixed. roll shaft.

37. A machine of the class described comprising a rotating blanksupport,a pair or' traversing rolls adapted to be simultaneously movedradiallyof the blank to roll the same, one of said rolls being a roughing rolland the other a finishing roll. i

38. A machine of the class described comprising a rotatable blanksupport a pair of traversing rolls adapted to be simultaneously movedradially of 'the blank to roll the same, one of said rolls being aroughing roll and having an arcuate Working face and the other of saidrolls being a finishing roll and havin a narrow substantiallycylindrical wor ing face and curved leading in signature.

39. A machine of the class described comprising a rotating blanksupport, a roll .adapted to be traversed radially of a blank on saidsupport to vroll the same, and mechanism for rotating said support andfor traversing said roll deriving its power from a common prime mover.

4:0. In a machine of the class described', a blank support having ashallow recess in its surface gradually. decreasing in depth `fromadjacent the center thereof toward the periphery and having a peripheralportion of greater depth than the portion adjacent thereto, togetherwith means for rolling a blank into said recess to give it a varyingcross sectional contour corresponding to the varying depths of saidrecess.

41. In a machine of the class described, a blank support having a'shallow recess in its surface gradually decreasing in depth fromadjacent the center thereof toward the periphery and having a peripheralportion ofl substantially uniform depth greater than the depth of theportion adjacent thereto, together with means for rolling a blank intosaid recess to give it a varying cross sectional contour correspondingto the varying depths of said recess. l

In witness whereof I .hereunto ailix my HARRY R. enna.

